1652H4A02 Ed.09
15
Regulation of cold with two temperature probes (S1 + S3)
This requires configuration of digital input 2 as cold room temperature (
I20
=10).
The device regulates the temperature of the cold room taking into account the reading of both probes. Using
parameter
C25
, the influence of probe S3 is determined in the regulation.
Examples:
C25
=0
(S1: 100 % S3: 0 %)
C25
=75 (S1: 25 % S3: 75 %)
C25
=60 (S1: 40 % S3: 60 %)
C25
=95 (S1: 5 % S3: 95 %)
This mode is particularly useful in large volume cold room stores, where there may be significant variations of
temperature.
In the event of an error in probe 3 (E3), the controller only uses the reading of probe 1. If both probes break (E1 +
E3), the controller acts according to parameter
C6
.
Continuous cycle mode
This is used to quickly cool the cold room stores
before products are loaded and is activated by
pressing the
key for 3 seconds.
Upon activating this mode, the compressor begins to
operate until the temperature in probe S1 reaches the
set point value, minus the variation indicated in
parameter
C10
. The value of
C10
is always negative,
unless it is 0.
The unit will immediately return to normal operation.
Should it not be possible to reach this point, the
device will return to normal operation once the time
configured in
C9
has elapsed, or by pressing the
key again for 5 seconds.
Calibration of probe 1
Parameter
C0
allows for correction of the temperature detected by probe 1; this is particularly useful when the
probe cannot be located in the ideal place.
Set Point locking
Parameters
C2
and
C3
allow for an upper and lower limit to be established for the set point (
SP
), to protect the
product or installation from Set Point manipulation.
Product temperature
This function allows using a temperature probe to display the product temperature.To activate it, input 2 must be
configured as “Product temperature” (
I20
=11), and the display of all the probes activated sequentially (
C21
=0).
SP
SP+C10
Solenoid
ON
ON
SP+C1
S1
